When Snape heard the prophecy and pleaded with Voldemort to spare Lily's life, he may have inadvertently caused his downfall. While we know Voldemort killed Lily, he did give her a choice. If she stepped aside and allowed him to murder Harry, he would spare her. Lily refused and sacrificed herself to save her son.
Voldemort grants Snape's request to spare Lily because Lily's life is not important to him. Snape has done him a solid by reporting on the overheard prophesy, so this is an opportunity for Voldemort to appear magnanimous.
Voldemort tried to spare Lily, and may have agreed with Snape, before the attack took place, to let her live. Rowling has confirmed that Voldemort would have let Lily live. Lily's James/Harry free life was to be Snape's reward for good service, and Lord Voldemort always rewards his loyal followers, doesn't he?
In order to preserve his position as a trusted Death Eater, Severus Snape was forced to tell Voldemort the true date at which the Order planned to move Harry.
Voldemort had no idea Snape had loved Lily (he was told the latter desired her in a sexual, non romantic way) until Harry told him, hence the wild denial. The evidence for Snape's continued love, his doe Patronus, was known only to Dumbledore.
The fact that Lily chose James Potter, Harry's father, only fuels Snape's hostility towards Harry. Snape's character has been widely acclaimed by readers and critics. Rowling described him as "a gift of a character" whose story she had known since the first book.
Snape was torn. He 'loved' Harry in a way due to Lilly but every time he saw him he was reminded of his feelings for Lilly and Lilly's feelings for James. He also seemed to find Harry reminded him of his father whom was someone Snape hated. Hence he probably did not like Harry either.
He doesn't trust Snape as Dumbledore does, but he believes that he can detect any disloyalty. Moreover, Voldemort regards Snape as highly intelligent and therefore ' as a true Slytherin ' a person whose top priority is to take care of himself. To his twisted mind, selfless equals stupid.
Similarly to Harry, Snape's patronus represents a person. In the memories he gives Harry before his death, Snape shows Dumbledore his patronus, using the form to prove his love of Lily Potter, Harry's mother.
Snape loved Lily deeply: through their years at Hogwarts; through her marriage to another wizard, James Potter; through his time as a Death Eater; and long after her murder at the wand of Lord Voldemort.
However, years later, when Harry is 16, Dumbledore sees that Severus' patronus is STILL a doe, like Lily's. Meaning that Snape is STILL deeply in love with her, or at least with her memory. And if you note, it's said more as a statement than as a question - little intonation.
Later, Snape tries to apologize for calling Lily a Mudblood, but she's not interested; she ends their friendship due to his association with Death Eaters. Seventh Year: James becomes Head Boy and seems nice enough now for Lily to start dating him.
"The first thing Snape asks Harry is "Potter! What would I get if I added powdered root of asphodel to an infusion of wormwood?" According to Victorian Flower Language, asphodel is a type of lily meaning 'My regrets follow you to the grave' and wormwood means 'absence' and also typically symbolised bitter sorrow.
He'd have a hard time convincing his Death Eater friends not to kill her and she'd spend a lot of time hanging around with people who'd discriminate against her blood status. They could potentially have a child, but Snape doesn't seem like the person who'd want one to me. So I'd assume they'd have a childless marriage.
So basically a combination of factors: Snape explained to Voldemort that he was ever faithful to him. Snape had 16 years of information on Dumbledore to give to Voldemort. Snape also had information on the Order to give to Voldemort.
“You disgust me,” said Dumbledore, and Harry had never heard so much contempt in his voice. Snape seemed to shrink a little, “You do not care, then, about the deaths of her husband and child? They can die, as long as you have what you want?” Snape said nothing, but merely looked up at Dumbledore.
Dumbledore used Snape's guilt over his part on Lily's death to manipulate him, but with the full knowledge what type of jerk Snape was. Snape was, at one level, a tool for his main goal and, therefore, he had to put up with the way he treated students.
Bellatrix Lestrange (née Black) is the first female Death Eater introduced in the books. Aunt of Draco Malfoy and Nymphadora Tonks. She was introduced in Harry Potter and the Order of the Phoenix. She is the most faithful member of Voldemort's inner circle.
Most probably not. Snape's hatred of Harry came from having to see James's face every day and Lily's eyes behind his glasses. Harry would've been a constant reminder of the love Snape lost, and I believe it would've been more painful if he was in Slytherin because they'd have to see each other more.
He convinced the dark lord that he had no idea about Voldemort being a host in Quirrell's body, and he was trying to stop Quirrell from taking the stone for himself. This is explained in a conversation between Severus Snape and Bellatrix in half blood prince.
Neville Professor Snape Neville fears Professor Snape who treats him rudely with sarcastic comments. Neville seems afraid of this harsh treatment that makes him feel inferior constantly. Parvati Blood-stained, bandaged mummy Parvati is afraid of something that is scary to her, possibly because it can harm her.
He was cruel to many students, but especially toward Neville Longbottom. It was no fault of Neville's but was instead because of Snape's love for Lily. Neville was almost the Chosen One, and the fact that he wasn't broke Snape's heart to look at him, which caused Snape to lash out cruelly at an innocent child.
The acclaimed author explained that Harry paid tribute to Snape because of "forgiveness and gratitude." Though Snape bullied Harry, he also saved him.